Automatic adjusting device and method for impressed current cathodic protection of offshore wind turbine jacket foundation

Abstract

The invention discloses an automatic adjusting device and method for impressed current cathodic protection of an offshore wind turbine jacket foundation. The device comprises an auxiliary anode system, an electric sliding rail and a controller. The auxiliary anode system comprises an auxiliary anode unit, a supporting rope, a spiral spring and a circular ring fixing device; the electric sliding rail comprises a linear guide rail, a sliding block, a first auxiliary rod piece and a second auxiliary rod piece. The controller is electrically connected with the circular ring fixing device and the electric sliding rail, plans the optimal position of the auxiliary anode, drives a sliding block of the electric sliding rail to move to a designated horizontal position, drives the second auxiliary rod piece to extend and unscrew the circular ring fixing device, and drives a lateral telescopic assembly of the first auxiliary rod piece to be connected with a through hole of the connecting section. And then the rod piece is driven to extend or contract, so that the auxiliary anode reaches a specified height. According to the invention, automatic adjustment of the position of the auxiliary anode is realized, real-time adjustment can be realized according to the feedback potential information, manual participation is not needed, and the foundation steel structure of the fan jacket is effectively protected.

Description

Technical Field

[0001] This invention relates to the field of cathodic protection device technology, and in particular to an automated adjustment device and method for impressed current cathodic protection of offshore wind turbine jacket foundation. Background Technology

[0002] In recent years, offshore wind power has become an important part of my country's sustainable energy development strategy. However, the harsh marine environment poses a severe challenge to the safe operation of offshore wind power foundations. Jacket foundations are a common type of foundation structure for offshore wind power, consisting of two parts: the jacket and the piles. They are generally steel structures, with the jacket being a truss structure welded from multiple steel pipes. The components are dense and there are many welded parts, making corrosion protection quite difficult.

[0003] Cathodic protection is an essential corrosion prevention measure for marine structures. Depending on the current source, it can be divided into sacrificial anode and impressed current methods. Impressed current cathodic protection has advantages such as large output current and long system life, and is unaffected by the gravity and towing force of the sacrificial anode, making it widely used in marine engineering corrosion prevention. However, currently available impressed current cathodic protection systems mainly use fixed, tensioned, or remote installation structures for the auxiliary anodes. In these structures, the auxiliary anodes are welded or fixed to the structure by workers during the installation phase. Once operational, the auxiliary anodes can only release current in a fixed position, resulting in poor adjustability of the protective effect on the structure. During service, severe localized corrosion may occur due to coating damage, marine organism adhesion, etc. If only the output current is adjusted without adjusting the position of the auxiliary anode, it may lead to localized over-protection or under-protection.

[0004] Chinese patent CN 114875413B discloses an external impressed current cathodic protection device for ships with adjustable protection potential, including a connecting rod and a controller. The connecting rod has first fixing members sleeved at both ends, and a support assembly engaged at its upper part. A reference electrode is mounted on the connecting rod. The support assembly includes a threaded sleeve, a moving block, a connecting ring, a support spring, a support rod, and a second fixing member. By rotating the connecting rod, the threaded sleeve can be moved, causing one end of the support rod to rotate, thus moving the anode body at the other end of the support rod. The anode body is fixed by the support rod, and its height and spacing can be adjusted as needed, allowing the protection area of ​​the ship to be changed. However, this device still requires manual rotation of the connecting rod and can only adjust the position of a single auxiliary anode at a time. For jacket platforms in deep water, divers still need to make timely adjustments, and it cannot automatically adjust based on calculated optimal positions.

[0005] Therefore, there is an urgent need to develop an impressed current cathodic protection device for jacket foundations that can cover dense components and automatically adjust the position of the auxiliary anode. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automated adjustment device and method for impressed current cathodic protection of offshore wind turbine jacket foundation. This device can easily and conveniently adjust the position of the auxiliary anode without requiring maintenance personnel to dive down, resulting in a high safety factor. Moreover, it adjusts in real time, ensuring that the surface potential of the structure is always within the protected range, thus providing good corrosion protection.

[0007] To solve the above-mentioned technical problems, according to a first aspect of the present invention, the present invention adopts the following technical solution:

[0008] An automated adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation includes an auxiliary anode system, an electric slide rail, and a controller;

[0009] The auxiliary anode system includes an auxiliary anode unit, a support rope, a helical spring, and a circular ring fixing device. The upper and lower ends of the auxiliary anode unit are connected to the helical spring hooks. The auxiliary anode unit is connected to the support rope through a rotatable circular ring fixing device. The connecting section is provided with multiple circular through holes.

[0010] The electric slide rail includes a linear guide rail, a slider, a first auxiliary rod, and a second auxiliary rod. The ends of the linear guide rail are arranged diagonally on the guide frame. The slider is provided with a lifting ring at the bottom. The first and second auxiliary rods are both telescopic support rods with lateral telescopic components at their ends. The support rod of the first auxiliary rod can pass through the through hole of the connecting section of the circular ring fixing device.

[0011] The controller is electrically connected to the circular ring fixing device and the electric slide rail, and uses serial communication. The controller plans the optimal position of the auxiliary anode, drives the electric slide rail slider to move to the specified horizontal position, drives the second auxiliary rod to extend to the height of the auxiliary anode to be adjusted, unscrews the circular ring fixing device, drives the first auxiliary rod to extend to a certain height, extends the lateral telescopic component to the through hole of the connecting section, and then drives the first auxiliary rod to extend or retract so that the auxiliary anode reaches the specified height.

[0012] Furthermore, the auxiliary anode unit includes an auxiliary anode body, an anode cable, and a stainless steel frame. The anode cable extends out of the frame and passes through the helical spring, and is wound around the cable-laying device, which is mounted on the guide frame deck.

[0013] Furthermore, the ring fixing device consists of a main ring segment, a subordinate ring segment, and a connecting segment. The subordinate ring segment has a through hole on its side, through which a rope passes to connect each subordinate ring segment. The main ring segment is connected to the auxiliary anode unit through the connecting segment, which has a rotating shaft inside, and the rope is connected to the rotating shaft.

[0014] Furthermore, the first and second auxiliary rods are slidably connected to the linear guide rail at the top, and the distance between the rods and the slider is within the distance range between the auxiliary anode unit and the support rope. The lateral telescopic components at the ends are equipped with force sensors, which are electrically connected to the controller and communicate via serial port.

[0015] Furthermore, one end of the support rope of the auxiliary anode system passes through the lifting ring of the top slider and is wound around the wire-laying device, which is equipped with a tensioner. The other end passes through the lifting ring of the bottom slider and is fixed to the adjacent pile foundation.

[0016] Furthermore, in the auxiliary anode system, the number of through holes in the connection section between the i-th auxiliary anode unit and the ring fixing device along the water depth is n-i+1, where n is the total number of auxiliary anode units. The through holes are numbered sequentially from the side closest to the auxiliary anode towards the support rope, in the following order: through hole i1, through hole i2…in-i+1, rotating shaft 145. The horizontal position of the through hole in the first connection section is also the horizontal position of the through hole with the same number in the i-th connection section.

[0017] Furthermore, one end of the rotating shaft extends out of the connecting section, and the interface is watertight. Two plates with through holes are symmetrically provided on the side of the extended end of the rotating shaft. The diameter of the through holes is larger than the diameter of the lateral telescopic component of the second auxiliary rod. The horizontal position of the i-th rotating shaft extending along the water depth corresponds to the position of the through hole (i-1) closest to the rotating shaft in the (i-1)-th connecting section. n-i+2 .

[0018] Furthermore, there are a total of 4 sets of auxiliary anode systems, with the top and bottom located on the diagonal lines of the main column of the jacket; there are a total of 4 sets of electric slide rails, with the top 2 sets of guide rails installed within 1m below the jacket deck and the bottom 2 sets of guide rails installed within 1m above the jacket pile foundation. The top and bottom 2 sets of guide rails are at the same height and intersect at the center of the jacket plane; limiters are installed at 1 / 4 of the length from both ends of the linear guide rails to limit the movement range of the slider.

[0019] Furthermore, the helical spring, auxiliary rod, electric slide rail, and circular fixing device are all made of stainless steel, and the protection potential range is greater than that of steel; the support rope is made of fiber-reinforced composite material.

[0020] Furthermore, it also includes a potentiostat and a reference electrode. The potentiostat is installed on the deck of the guide frame, and the reference electrode is installed in the dense component area. The potentiostat is wired to the reference electrode and the auxiliary anode system. The potentiostat is electrically connected to the controller and uses serial communication.

[0021] According to a second aspect of the present invention, the present invention provides the following technical solution:

[0022] An automated adjustment method for impressed current cathodic protection of offshore wind turbine jacket foundation includes the following steps:

[0023] S1: Based on the potential measurement value returned by the reference electrode, the controller plans the optimal position of the auxiliary anode system and the optimal output current of the potentiostat;

[0024] S2: The controller drives the slider in the electric slide rail to move to the specified position;

[0025] S3: The controller drives the second auxiliary rod to extend to the i-th auxiliary anode unit that needs to be adjusted, and slides it to the rotating shaft of the corresponding ring fixing device connecting section. It extends the lateral telescopic component, passes through the two through holes on the side of the rotating shaft, and rotates to loosen the ring fixing device. It stops when the force sensor reading is 0.

[0026] S4: The controller drives the first auxiliary rod to slide to the (n-i+1)th through hole in the connecting section, i.e., the through hole at the position of the rotation axis. If it is necessary to raise the auxiliary anode unit, the auxiliary rod continues to extend until it passes through the through hole, the lateral telescopic assembly is opened, and the auxiliary rod is retracted until the force sensor measurement reaches kx (k is the stiffness of the helical spring, and x is the vertical distance that the auxiliary anode needs to move). If it is necessary to lower the auxiliary anode unit, the lateral telescopic assembly is opened, and the auxiliary rod continues to extend until the force sensor measurement reaches kx.

[0027] S5: The controller drives the second auxiliary rod to rotate in the opposite direction, tightens the ring fixing device, stops when the force sensor reading suddenly increases, and retracts the lateral telescopic component, and then retracts the second auxiliary rod;

[0028] S6: The controller drives the first auxiliary rod to retract the lateral telescopic assembly and the rod length, completing the automatic adjustment of the height of the i-th auxiliary anode unit.

[0029] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0030] (1) The present invention combines the auxiliary anode unit with a helical spring, a circular ring fixing device and a support rope to form an auxiliary anode system. The system is connected to an electric slide rail installed on the guide frame platform and the bottom pile foundation. The horizontal distance between the auxiliary anode and the protected area is adjusted by the electric slide rail. The circular ring fixing device is loosened by the auxiliary rod, the helical spring is stretched or compressed, and then the circular ring fixing device is tightened to realize the adjustment of the height of the auxiliary anode. The adjustment process is fully automatic and does not require maintenance personnel to dive down to operate, so the safety factor is high.

[0031] (2) The present invention arranges auxiliary anode systems at the four diagonal corners of the guide frame. The adjustment range of the auxiliary anodes is limited to the diagonal plane by electric guide rails arranged along the diagonal, which greatly reduces the amount of calculation of the controller. It can quickly obtain the optimized position of the auxiliary anodes and adjust them in real time. Moreover, the auxiliary anode system can be set with multiple auxiliary anodes to achieve effective protection of dense components.

[0032] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0033] (1) The present invention combines the auxiliary anode unit with a helical spring, a circular ring fixing device and a support rope to form an auxiliary anode system. The system is connected to an electric slide rail installed on the guide frame platform and the bottom pile foundation. The horizontal distance between the auxiliary anode and the protected area is adjusted by the electric slide rail. The circular ring fixing device is loosened by the auxiliary rod, the helical spring is stretched or compressed, and then the circular ring fixing device is tightened to realize the adjustment of the height of the auxiliary anode. The adjustment process is fully automatic and does not require maintenance personnel to dive down to operate, so the safety factor is high.

[0034] (2) The present invention arranges auxiliary anode systems at the four diagonal corners of the guide frame. The adjustment range of the auxiliary anodes is limited to the diagonal plane by electric guide rails arranged along the diagonal, which greatly reduces the amount of calculation of the controller. It can quickly obtain the optimized position of the auxiliary anodes and adjust them in real time. Moreover, the auxiliary anode system can be set with multiple auxiliary anodes to achieve effective protection of dense components. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to the present invention;

[0036] Figure 2 This is a cross-sectional view of the auxiliary anode system in this invention;

[0037] Figure 3 This is a schematic diagram of the electric slide rail in this invention.

[0038] In the diagram: 1. Auxiliary anode system; 11. Auxiliary anode unit; 111. Auxiliary anode body; 112. Anode cable; 113. Stainless steel frame; 12. Support rope; 13. Helical spring; 14. Circular ring fixing device; 141. Main ring section; 142. Subordinate ring section; 143. Connecting section; 144. Rope; 145. Rotating shaft; 146. Plate with through hole; 2. Electric slide rail; 21. Linear guide rail; 22. Slider; 23. First auxiliary rod; 24. Second auxiliary rod; 25. Lateral telescopic assembly; 26. Limiter; 3. Controller; 4. Potentiometer; 5. Anode cable laying device; 6. Support rope laying device. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Example 1

[0043] This embodiment provides an automated adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundations to solve the problem of difficulty in adjusting the auxiliary anode position in existing cathodic protection technologies; Reference Figures 1-3The system includes an auxiliary anode system 1, an electric slide rail 2, and a controller 3. The auxiliary anode system 1 includes an auxiliary anode unit 11, a support rope 12, a helical spring 13, and a circular ring fixing device 14. The upper and lower ends of the auxiliary anode unit 11 are connected to the hooks of the helical spring 13. The auxiliary anode unit 11 and the support rope 12 are connected by a rotatable circular ring fixing device 14. The connecting section 143 has multiple circular through holes. The electric slide rail 2 includes a linear guide rail 21, a slider 22, a first auxiliary rod 23, and a second auxiliary rod 24. The ends of the linear guide rail 21 are arranged diagonally on the guide frame. The slider 22 is equipped with a lifting ring. The first auxiliary rod 23 and the second auxiliary rod 24 are both rotatable. The telescopic strut has a lateral telescopic component 25 at its end. The strut of the first auxiliary rod can pass through the through hole of the connecting section 143 of the circular fixing device. The controller 3 is electrically connected to the circular fixing device 14 and the electric slide rail 2, and uses serial communication. The controller 3 plans the optimal position of the auxiliary anode, drives the slider 22 to move to the specified horizontal position, drives the second auxiliary rod 24 to extend to the height of the auxiliary anode unit 11 to be adjusted, loosens the circular fixing device 14, drives the first auxiliary rod 23 to extend to a certain height, extends the lateral telescopic component 25, connects with the through hole of the connecting section, and then drives the rod to extend or retract to make the auxiliary anode reach the specified height. The controller plans the optimal position of the auxiliary anode based on the structural surface potential information returned by the reference electrode, drives the auxiliary rod to loosen the fixing device, adjusts the position of the auxiliary anode, and then fixes it. The whole process does not require manual intervention, which greatly saves labor costs, and can be flexibly adjusted in real time according to the potential information, significantly reducing the risk of structural corrosion.

[0044] refer to Figure 1 , 2 The auxiliary anode unit 11 includes an auxiliary anode body 111, an anode cable 112, and a stainless steel frame 113. The anode cable 112 extends out of the frame 113 and passes through the helical spring 13, and is wound on the anode cable delivery device 5, which is installed on the guide frame deck.

[0045] refer to Figure 2 The circular ring fixing device 14 consists of a main ring segment 141, a subordinate ring segment 142, and a connecting segment 143. The subordinate ring segment 142 has a through hole on its side, and a rope 144 passes through the through hole to connect each subordinate ring segment. The main ring segment 141 is connected to the auxiliary anode unit 11 through the connecting segment 143. The connecting segment has a rotating shaft 145 inside, and the rope 144 is connected to the rotating shaft 145.

[0046] refer to Figure 2The first auxiliary rod 23 and the second auxiliary rod 24 are connected to the top linear guide rail 21 via a slider 22. The distance between the rod and the slider 22 is within the distance between the auxiliary anode unit 11 and the support rope 12. A force sensor is installed on the lateral telescopic component 25 at the end. The force sensor is electrically connected to the controller 3 and uses serial communication. The force sensor can measure the force on the contact points, enabling the tightening and accurate position adjustment of the ring fixing device 14. In the second auxiliary rod 24, a measured value of 0 indicates a non-contact state, meaning the ring fixing device 14 is loose; a sudden increase in the measured value indicates the ring is fully fixed. In the first auxiliary rod 23, when the measured value is kx (k is the helical spring stiffness, and x is the vertical distance the auxiliary anode needs to move), the position of the auxiliary anode unit reaches the set value.

[0047] refer to Figure 1 , 3 One end of the support rope 12 of the auxiliary anode system passes through the lifting ring of the top slider 22 and is wound around the support rope release device 6, which is equipped with a tensioner. The other end passes through the lifting ring of the bottom slider and is fixed to the adjacent pile foundation.

[0048] In the auxiliary anode system, the number of through holes in the connection section 143 between the i-th auxiliary anode unit 11 and the ring fixing device along the water depth is n-i+1, where n is the total number of auxiliary anode units. The through holes are numbered sequentially from the side closest to the auxiliary anode unit 11 toward the support rope 12, in the order of through hole i1, through hole i2...i n-i+1 The horizontal position of the through hole in the first connecting segment 143 is also the horizontal position of the through hole with the same number in the i-th connecting segment 143.

[0049] refer to Figure 2 The upper end of the rotating shaft 145 extends out to the connecting section 143, and the interface is watertight. Two plates 146 with through holes are symmetrically provided on the side of the extended end of the rotating shaft. The diameter of the through holes is larger than the diameter of the lateral telescopic component 25 of the second auxiliary rod 24. The horizontal position of the i-th rotating shaft 145 extending along the water depth corresponds to the position of the through hole (i-1) closest to the rotating shaft 145 in the (i-1)-th connecting section 143. n-i+2 .

[0050] The auxiliary anode system consists of four sets, located diagonally opposite the main columns of the jacket structure at the top and bottom. The electric slide rails consist of four sets: the top two sets are installed within 1 meter below the jacket deck, and the bottom two sets are installed within 1 meter above the jacket pile foundation. The top and bottom sets are at the same height and intersect at the center of the jacket plane. Limiters are installed at one-third of the length from both ends of the linear guide rails 21 to restrict the movement range of the sliders. Typically, the diameter of the main column of the jacket structure is larger than that of the support rod, and the area to be protected by the main column is larger than that of the support rod. Therefore, the auxiliary anode system is arranged diagonally opposite the main column, so that more of the current flowing from the auxiliary anodes acts on the main column. Furthermore, limiters are installed at one-third of the length of the linear guide rail to restrict the position of the auxiliary anodes and prevent them from moving excessively towards the center, causing unnecessary current loss.

[0051] The helical spring 13, auxiliary rods 23 and 24, electric slide rail 2, and circular fixing device 14 are all made of stainless steel, with a protection potential range greater than that of steel, which can reduce current loss; the support rope 12 is made of fiber-reinforced composite material, which has a long service life in marine environments.

[0052] It also includes a potentiostat 4 and a reference electrode. The potentiostat 4 is installed on the deck of the guide frame, and the reference electrode is installed in the dense component area. The potentiostat is wired to the reference electrode and the auxiliary anode system. The potentiostat is electrically connected to the controller and uses serial communication.

[0053] Example 2

[0054] This embodiment provides an adjustment method for an automated adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundations. This method can be implemented using the automated adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundations provided in Embodiment 1, specifically including:

[0055] S1: Based on the potential measurement value returned by the reference electrode, the controller 3 plans the optimal position of the auxiliary anode system and the optimal output current of the potentiostat.

[0056] S2: Controller 3 drives slider 22 in electric slide rail 2 to move to the designated position;

[0057] S3: The controller 3 drives the second auxiliary rod 24 to extend to the i-th auxiliary anode unit 11 that needs to be adjusted, and slides to the rotating shaft 145 of the corresponding ring fixing device connecting section, extends the lateral telescopic component 25, passes through the through hole of the side plate 146 at the extension end of the rotating shaft, and rotates to loosen the ring fixing device 14. It stops when the force sensor reading is 0.

[0058] S4: Controller 3 drives the first auxiliary rod 23 to slide to the (n-i+1)th through hole of the connecting section 143, that is, the through hole closest to the rotation axis 145. If it is necessary to raise the auxiliary anode unit 11, the auxiliary rod continues to extend until it passes through the through hole, the lateral telescopic component 25 is opened, and the auxiliary rod is retracted until the force sensor measurement reaches kx (k is the stiffness of the helical spring, and x is the vertical distance that the auxiliary anode needs to move). If it is necessary to lower the auxiliary anode unit 11, the lateral telescopic component 25 is opened, and the auxiliary rod continues to extend until the force sensor measurement reaches kx.

[0059] S5: Controller 3 drives the second auxiliary rod 24 to rotate in the opposite direction, tightens the ring fixing device 14, stops when the force sensor reading suddenly increases, and retracts the lateral telescopic component 25, and then retracts the second auxiliary rod 24.

[0060] S6: Controller 3 drives the first auxiliary rod 23 to retract the lateral telescopic assembly 25 and the rod length, completing the automatic adjustment of the height of the i-th auxiliary anode unit.

[0061] This enables fully automated adjustment, eliminating the need for maintenance personnel to dive down into the structure, ensuring a high safety factor, and allowing for real-time adjustment of structural potential, effectively protecting the jacket.

[0062] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automated adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation, characterized in that, Includes auxiliary anode system, electric slide rail, and controller; The auxiliary anode system includes an auxiliary anode unit, a support rope, a helical spring, and a circular ring fixing device. The upper and lower ends of the auxiliary anode unit are connected to the helical spring hooks. The auxiliary anode unit is connected to the support rope through a rotatable circular ring fixing device. The connecting section is provided with multiple circular through holes. The electric slide rail includes a linear guide rail, a slider, a first auxiliary rod, and a second auxiliary rod. The ends of the linear guide rail are arranged diagonally on the guide frame. The slider is provided with a lifting ring. The first and second auxiliary rods are both telescopic support rods with lateral telescopic components at their ends. The support rod of the first auxiliary rod can pass through the through hole of the connecting section of the circular ring fixing device. The controller is electrically connected to the circular ring fixing device and the electric slide rail, and uses serial communication. The controller plans the optimal position of the auxiliary anode, drives the electric slide rail slider to move to the specified horizontal position, drives the second auxiliary rod to extend to the height of the auxiliary anode to be adjusted, unscrews the circular ring fixing device, drives the first auxiliary rod to extend to a certain height, extends the lateral telescopic component to the through hole of the connecting section, and then drives the first auxiliary rod to extend or retract so that the auxiliary anode reaches the specified height.

2. The automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to claim 1, characterized in that, The auxiliary anode unit includes an auxiliary anode body, an anode cable, and a stainless steel frame. The anode cable extends out of the frame and passes through the helical spring, and is wound around the wire feeding device, which is installed on the guide frame deck.

3. The automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to claim 1, characterized in that, The circular ring fixing device consists of a main ring segment, a subordinate ring segment, and a connecting segment. The subordinate ring segment has a through hole on its side, through which a rope passes to connect each subordinate ring segment. The main ring segment is connected to the auxiliary anode unit through the connecting segment. The connecting segment has a rotating shaft inside, and the rope is connected to the rotating shaft.

4. The automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to claim 1, characterized in that, The first and second auxiliary rods are slidably connected to the linear guide rail at the top. The distance between the rod and the slider is within the distance range between the auxiliary anode unit and the support rope. The lateral telescopic component at the end of the rod is equipped with a force sensor. The force sensor is electrically connected to the controller and uses serial communication.

5. The automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to claim 1, characterized in that, One end of the support rope of the auxiliary anode system passes through the hanging ring of the top slider and is wound around the wire laying device, which is equipped with a tensioner. The other end passes through the hanging ring of the bottom slider and is fixed to the adjacent pile foundation.

6. The automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to claim 1, characterized in that, The number of through holes in the connection section between the i-th auxiliary anode unit and the ring fixing device along the water depth in the auxiliary anode system is n-i+1, where n is the total number of auxiliary anode units. The through holes are numbered sequentially from the side closest to the auxiliary anode unit toward the support rope, in the following order: through hole i1, through hole i2...in-i+1, rotating shaft 145. The horizontal position of the through hole in the first connection section is also the horizontal position of the through hole with the same number in the i-th connection section.

7. The automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to claim 2, characterized in that, One end of the rotating shaft extends out of the connecting section, and the interface is watertight. Two plates with through holes are symmetrically provided on the side of the extended end of the rotating shaft. The diameter of the through holes is larger than the diameter of the lateral telescopic component of the second auxiliary rod. The horizontal position of the i-th rotating shaft extending along the water depth corresponds to the position of the through hole (i-1) of the rotating shaft position in the (i-1)-th connecting section. n-i+2 .

8. The automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to claim 1, characterized in that, The auxiliary anode system consists of 4 sets, with the top and bottom located on the diagonal lines of the main column of the jacket; the electric slide rail consists of 4 sets, with the top 2 sets installed within 1m below the jacket deck and the bottom 2 sets installed within 1m above the jacket pile foundation. The top and bottom sets of guide rails are at the same height and intersect at the center of the jacket plane; limiters are installed at 1 / 4 of the length from both ends of the linear guide rail to restrict the movement range of the slider.

9. The automatic adjustment device for impressed current cathodic protection of offshore wind turbine jacket foundation according to claim 1, characterized in that, It also includes a potentiostat and a reference electrode. The potentiostat is installed on the deck of the guide frame, and the reference electrode is installed in the dense component area. The potentiostat is wired to the reference electrode and the auxiliary anode system. The potentiostat is electrically connected to the controller and uses serial communication.

10. An automated adjustment method for impressed current cathodic protection of offshore wind turbine jacket foundation, characterized in that, The adjustment method includes the following steps: S1: Based on the potential measurement value returned by the reference electrode, the controller plans the optimal position of the auxiliary anode system and the optimal output current of the potentiostat; S2: The controller drives the slider in the electric slide rail to move to the specified position; S3: The controller drives the second auxiliary rod to extend to the i-th auxiliary anode unit that needs to be adjusted, and slides it to the rotating shaft of the corresponding ring fixing device connecting section. It extends the lateral telescopic component, passes through the two through holes on the side of the rotating shaft, and rotates to loosen the ring fixing device. It stops when the force sensor reading is 0. S4: The controller drives the first auxiliary rod to slide to the (n-i+1)th through hole in the connection area, which is the through hole closest to the rotation axis. If it is necessary to raise the auxiliary anode unit, the auxiliary rod continues to extend until it passes through the through hole, the lateral telescopic component is opened, and the auxiliary rod is retracted until the force sensor measurement reaches kx (k is the stiffness of the helical spring, and x is the vertical distance that the auxiliary anode needs to move). If it is necessary to lower the auxiliary anode unit, the lateral telescopic component is opened, and the auxiliary rod continues to extend until the force sensor measurement reaches kx. S5: The controller drives the second auxiliary rod to rotate in the opposite direction, tightens the ring fixing device, stops when the force sensor reading suddenly increases, and retracts the lateral telescopic component, and then retracts the second auxiliary rod; S6: The controller drives the first auxiliary rod to retract the lateral telescopic assembly and the rod length, completing the automatic adjustment of the height of the i-th auxiliary anode unit.

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